Profit can also read a simple text file which lists the energy and
counts in a spectrum. In this case, some basic formatting is
necessary for profit to understand the file. The first line of the
file must be:
FORMAT = profit
and the second line should be
TTYPE = E_MIN E_MAX COUNTS
if the file has three columns of data, listing both the minimum and maximum energies of each bin. Alternatively, this line should read
TTYPE = E_MIN COUNTS
if the data lists only the central energy and counts in each spectrum. At the moment, profit assumes the errors are Poissonian; we expect to include a facility for including errors in a future release.
Some additional ``keywords'' can be included, which profit will read
and put into the Spectrum Information Window. For example, the
following lines added at the beginning of a text file:
EXPOSURE=3600 DATE-OBS=2005-04-01T02:21:38 INSTRUMENT=B21LAB GRATING=BRAGG OBJECT=Run10583 ! Note: Neon and Iron plasma run with T = 0.7 keV, n = 1e13 cm-3will make profit list the exposure as 3600 seconds, the observation date as listed, the detector to be B21LAB:BRAGG, and the source name to be Run10583. Finally, comments can be included in the file if they are prefaced with an exclamation mark (!).